What is the bearing metallurgy used in 2001 Audis?

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799
Location
Washington, DC
I just got results of my UOA back and there was unusually high aluminum reading, while all other metals were fine. Latest UOA I think high aluminum reading might be due to the way oil was sampled but just to make sure I would like to find out what is the 2 and 3 material bearing shell(shown in the image below) made from in this particular engine design? Car is 2001 Audi S4 with 2.7L twin turbo V6 engine. Would anyone know this or where could I find this info?
 
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723
Location
Lower Alabama
Audi's have bearings? In all seriousness, you should probably employ the services of Terry Dyson if you're worried about it. Personally, I wouldn't get bent out of shape until I saw it on two consecutive reports. 30 ppm isn't an outrageous number.
 
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18,449
Location
East of IGO
Many bearings [most] are several layers. I do not know the type of bearings used. Wear numbers increase [usually] as the load increases.
 
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43,675
Location
Ontario, Canada
It has bi-metal rod bearings from what the article cited above said, you are much more likely to get rod bearing wear than main bearing wear, and the first metal is aluminum. So it would make sense......
 

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Thread starter
Messages
799
Location
Washington, DC
UPDATE: I was monitoring my coolant level past week and there was no change so that confirms my initial assumption that aluminum and sodium came from improper oil sampling for last UOA :-)!
 
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